Hair with volume is hair that is full and thick, giving the appearance of having more volume. For example, a person with curly or frizzy hair will often have more volume than someone with straight or fine hair.
Volume in hair is important because it can make hair look fuller, thicker, and healthier. It can also make it easier to style hair and hold it in place. Historically, women have used various methods to add volume to their hair, such as teasing it, using volumizing shampoos and conditioners, and getting perms.